WTA World is bigger and quite important, too ... if not even more important than MTF for the operators and admins... and many old users who are primarly regulars on WTA World have an MTF account from old times whereas the same vice versa appears to be less likely

WTA World is bigger and quite important, too ... if not even more important than MTF for the operators and admins... and many old users who are primarly regulars on WTA World have an MTF account from old times whereas the same vice versa appears to be less likely